| a) ALPHA = 20°: GAMMA = 180° - 2 * 20° = 180° - 40° = 160° |
| ALPHA = 70°: GAMMA = 180° - 2 * 70° = 180° - 140° = 40° |
| ALPHA = 81°: GAMMA = 180° - 2 * 81° = 180° - 162° = 18° |
| ALPHA = 89°: GAMMA = 180° - 2 * 89° = 180° - 178° = 2° |
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| b) Gleichung: GAMMA = 180° - 2 ALPHA |
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| c) GAMMA = 30°: ALPHA = 180° - 30° - ALPHA |
| 2 ALPHA = 150° |
| ALPHA = 75° |
| GAMMA = 50°: ALPHA = (180° - 50°)/2 = 130°/2 = 65° |
| GAMMA = 120°: ALPHA = (180° - 120°)/2 = 60°/2 = 30° |
| GAMMA = 178°: ALPHA = (180° - 178°)/2 = 2°/2 = 1° |
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| d) Gleichung: ALPHA = (180° - GAMMA)/2 |
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